This is a sheet music for geomungo, a traditional Korean musical instrument compiled by a person named Unmong based on one made by Han Rip in November during the Jeonghae year. It consists of several songs such as Joeum, Bukjeon, Mandaeyeop, Jungdaeyeop, Sakdaeyeop, and Hoeipjo. Both oral sound and simplified score were written, with all the lyrics omitted. A simple explanation is given with the original source in front of each piece with useful memos for music players. It is a valuable material for those studying the history of music in the late Joseon Period.